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Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

By signing in with a Microsoft account, the new MSN allows you to personalize your experience on MSN and to take that experience with you on every device, including the MSN website and the MSN apps.

安装 Windows 11. 在针对你的特定电脑测试和验证 Windows 11 升级后，Windows 更新将指示它已准备好安装。 若要检查 Windows 11 是否已为你的设备准备就绪，请转到“开始” “设置” >“更新和安全性” >“Windows 更新” ，然后选择“检查更新”。 如果升级适用于你的设备，并且想要继续，请下载并安装它。

If you have this Surface. Find it here. Surface Laptop, any Surface Laptop Go, and Surface Laptop SE. Look under your keyboard near the hinge. Any Surface Laptop Studio. Starting in Laptop mode, gently rotate the top of the display backwards 180 degrees.

Notes: Starting in Outlook for Windows Version 2303 (Build 16215.10000), the All Apps button replaces the Get Add-ins buttonon the ribbon to view installed add-ins and access the Office Store.If you’re using an earlier version of Outlook, you'll see the Get Add-ins button instead.. If you don't see All Apps on the ribbon, your administrator may have turned off add-ins for your organization.

Get steps for connecting a Miracast wireless display. If pressing the Connect button in the action center doesn't find your device, try the troubleshooting steps provided at Fix connections to Miracast wireless displays.

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Microsoft account help and support. Get help with signing in, locked or compromised accounts, linked accounts, closing, reopening, and updating your security info and account profile.